v7.0.0

What's Changed

• [BREAKING] FsUnit.Xunit now consumes xunit.v3 as testing framework. - (#297)
• Update to NHamcrest v4.0.
• Update to MsTest v3.6 in Fs30Unit.MsTest.
• Update other dependencies.

Full Changelog: 6.0.1...7.0.0